Answer:
0.017 m
Explanation:
Wavelength: This can be defined as the distance covered in one complete oscillation by a wave. The S.I unit of wave length is meter (m).
The expression for wave length is given as
v = λf ............................... Equation 1
Where v = speed of sound in air, λ = wave length of sound, f = frequency of sound.
make λ the subject of the equation,
λ = v/f ............................... Equation 2
Given: v = 340 m/s, f = 20000 Hz
Substitute into equation 2
λ = 340/20000
λ = 0.017 m.
Hence the wave length of sound in air = 0.017 m
Answer:
Option D) -0.0707
Explanation:
We are given the following in the question:
Population mean, μ = 45 mp
Sample mean, = 44.9
Sample size, n = 50
Sample standard deviation, s = 10
Formula:
Putting all the values, we have
Thus, the test statistic is
Option D) -0.0707
B
Explanation:
BECAUSE IT WAS GOING UPWORD THEN IT'S VELOCITY WAS DECREASING -10MS¹
Answer:
Keep going you are doing great, if you need a break go take a short walk